docs(starters): update default readme

Author: larbish

.starters/default/README.md

@@ -4,6 +4,9 @@
 
 This is the default Docus starter template that provides everything you need to build beautiful documentation sites with Markdown and Vue components.
 
+> [!TIP]
+> If you're looking for i18n support, check out the [i18n starter](https://github.com/nuxt-themes/docus/tree/main/.starters/i18n).
+
 ## ✨ Features
 
 - 🎨 **Beautiful Design** - Clean, modern documentation theme